381830 has 8 divisors (see below), whose sum is σ = 687312. Its totient is φ = 152728.

The previous prime is 381817. The next prime is 381841. The reversal of 381830 is 38183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 381796 and 381805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19082 + ... + 19101.

It is an arithmetic number, because the mean of its divisors is an integer number (85914).

2³⁸¹⁸³⁰ is an apocalyptic number.

381830 is a deficient number, since it is larger than the sum of its proper divisors (305482).

381830 is a wasteful number, since it uses less digits than its factorization.

381830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38190.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 381830 is about 617.9239435400. The cubic root of 381830 is about 72.5476500073.

The spelling of 381830 in words is "three hundred eighty-one thousand, eight hundred thirty".